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Assuming you have GNU date available:
$ s=$(( $(date -d "Jul 13 01:02:01" +%s) - $(date -d "Jul 12 16:02:01" +%s) ))
$ printf "%02d:%02d:%02d\n" $((s/3600)) $((s%3600/60)) $((s%60))
09:00:00

It can be done, but it is not pretty :)$ip=~/\b((2[0-5][0-5]\.)|(1?[0-9]?[0-9]\.)){3}((2[0-5][0-5])|(1?[0-9]?[0-9]))\b/

Let's break it down bit by bit.



find / # Search inside /
-path /proc -prune # Ignore anything inside /proc
-o -path /new-disk -prune # OR ignore...

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awk '{print >$2%2".dat"}' infile

you will get 2 files: 0.dat (even number) and 1.dat (odd number)

The swap space is used also used for system hibernation, and the resume line tells the kernel where to look for the hibernation signature and to load the old RAM contents from.

It's because the shell redirection happens before all the rest. You can put it wherever you like:

% >infile echo ok
% cat infile
ok
% echo >infile ok
% cat infile
ok

There's a large amount of overlap between C and C++; learning C++ without learning any C would be very tricky. Strangely, and often disastrously, this is the way it is frequently taught anyway. ...

ls -l | cut -c1 | sort | uniq -c

Basically, a soft link is a special kind of file that points to a different file somewhere on the available (mounted) filesystems. A hard link is a regular file entry in a directory, only that it...

That's a pure semantic issue. What the "swap -s" command reports are accurate virtual memory statistics. "Total swap space" has always been used to describe the whole virtual memory under Solaris so...

How you do usually deal with files in use during a backup?
Is there a option to let TAR skip opened files?
Or notify me an opened file is tar'ed?

What's the best practice?

Thanks